Now showing items 1-20 of 42

    • A frequency approach on MIMO DSP for optical communication systems 

      Palou Garcia, Xavier (Universitat Politècnica de Catalunya, 2013-02-28)
      Master thesis (pre-Bologna period)
      120 months embargo
      [ANGLÈS] Spatial Division Multiplexing (SDM) has arisen during the last years as the most promising technique to overcome the increasing necessity of capacity of the communication systems while avoiding the theoretical ...
    • A resource management scheme for multi-user GFDM with adaptive modulation in frequency selective fading channels 

      Tornés Molins, Bernat (Universitat Politècnica de Catalunya, 2016-05-03)
      Bachelor thesis
      Open Access
      Covenantee:   Technische Universität Dresden
      This final project focus on designing and evaluating a resource management scheme for a multi-user generalized frequency division multiplexing (GFDM) system, when a frequency selective fading channel and adaptive modulation ...
    • Advanced routing mechanisms in ASON/GMPLS networks 

      Agraz Bujan, Fernando (Universitat Politècnica de Catalunya, 2012-10-01)
      Doctoral thesis
      Open Access
      Current network infrastructures are supported on a layered model whereby heterogeneous data traffic can be seamlessly transported. In this architecture, where client/server relationships are established between adjacent ...
    • All-optical communication system based on orthogonal frequency-division multiplexing (OFDM) and optical time-division multiplexing (OTDM) 

      Cañibano Nuñez, Héctor (Universitat Politècnica de Catalunya, 2014-05-13)
      Master thesis (pre-Bologna period)
      Open Access
      Covenantee:   Danmarks tekniske universitet
      [ANGLÈS] We propose and demonstrate a novel principle that combines optical orthogonal frequency-division multiplexing (O-OFDM) and optical time-division multiplexing (OTDM). The principle is based on generating and ...
    • Analytical blocking probability model for hybrid immediate and advance reservations in optical WDM networks 

      Triay Marquès, Joan; Cervelló Pastor, Cristina; Vokkarane, Vinod M. (2013)
      Article
      Restricted access - publisher's policy
      Immediate reservation (IR) and advance reservation (AR) are the two main reservation mechanisms currently implemented on large-scale scientific optical networks. They can be used to satisfy both provisioning delay and low ...
    • Analytical models for the multiplexing of worst case traffic sources and their application to ATM traffic control. 

      Barceló Ordinas, José María (Universitat Politècnica de Catalunya, 1998-04-23)
      Doctoral thesis
      Open Access
    • Autonomous and energy efficient lightpath operation based on digital subcarrier multiplexing 

      Velasco Esteban, Luis Domingo; Barzegar, Sima; Sequeira, Diogo Gonçalo; Ferrari, Alessio; Costa, Nelson; Curri, Vittorio; Pedro, João; Napoli, Antonio; Ruiz Ramírez, Marc (2021-03-09)
      Article
      Open Access
      The massive deployment of 5G and beyond will require high capacity and low latency connectivity services, so network operators will have either to overprovision capacity in their transport networks or to upgrade the optical ...
    • Chirp-based direct phase modulation of VCSELs managed by Neural Networks 

      Kais Carranza, Johanna Libertad (Universitat Politècnica de Catalunya, 2019-05-29)
      Master thesis
      Open Access
      VCSEL's capacity of direct modulation and its low cost makes this device a feasible cost-effective transmitter for ultra-dense wavelength division multiplexing (uDWDM) metro-access networks using coherent detection. However, ...
    • Contributions to network planning and operation of Flex-Grid/SDM optical core networks 

      Rumipamba Zambrano, Rubén Darío (Universitat Politècnica de Catalunya, 2019-03-14)
      Doctoral thesis
      Open Access
      The ever demanding bandwidth requirements for supporting emerging telecom services such as ultra-high-definition video streaming, cloud computing, connected car, virtual/augmented reality, etc., bring to the fore the ...
    • Cost-effective spatial super-channel allocation in Flex-Grid/MCF optical core networks 

      Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Gené Bernaus, Joan M.; Spadaro, Salvatore (2018-01-01)
      Article
      Open Access
      Space Division Multiplexing (SDM) is a key technology to cope with the bandwidth limitations of single mode fibers. Multi-Core Fibers (MCFs) are considered as a promising candidate technology to implement SDM, due to their ...
    • Design and assessment of FM-MCFs-suited SDM-ROADMs with versatile spatial group configurations and unified QoT estimator 

      Rumipamba Zambrano, Rubén Darío; Muñoz González, Raül; Casellas Regi, Ramon; Perelló Muntan, Jordi; Spadaro, Salvatore; Elfiqi, Abdulaziz E. (Institute of Electrical and Electronics Engineers (IEEE), 2020-11-15)
      Article
      Open Access
      In this article, we focus on the design of different node architectures suitable for few-mode multi-core fibers (FMMCFs) based networks. Both dimensions, core and mode, open different possible ways to group spatial channels ...
    • Design of a real-time multiplexed blood flow sensorial system 

      Mitjans Coma, Marc (Universitat Politècnica de Catalunya, 2018-01-18)
      Master thesis
      Restricted access - confidentiality agreement
    • Dual-polarized feed for mmWave lens antennas 

      Albadalejo Lijarcio, Juan Luis (Universitat Politècnica de Catalunya, 2020-05)
      Master thesis
      Open Access
      Covenantee:   Kungliga Tekniska högskolan / Ericsson
      The fact of being bulky and not very cost-efficient made lens antennas not to be taken much into account in the past. Nowadays, this kind of antennas has attracted more attention due to the increasing demand of higher ...
    • Dynamic traffic grooming in Joint Switching (JoS)-enabled flex-grid/SDM optical core networks 

      Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Open Access
      We propose and evaluate a dynamic traffic grooming strategy enhancing the performance of JoS-enabled Flex-Grid/SDM networks. Results disclose up to 120% and 44% additional carried network traffic vs. no grooming and existing ...
    • Efficient time gating in ultrafast optical TDM networks 

      Yazdani, Arash; Rincón Rivera, David; Sallent Ribes, Sebastián (2014-12-01)
      Article
      Restricted access - publisher's policy
      Ultrafast optical communication is the backbone of high-speed global networking infrastructure. Optical time division multiplexing (OTDM) is a popular technique for embedding data from many simultaneous users on a single ...
    • Elastic Networks thematic network results I: Planning and control of Flex-Grid/SDM 

      Moreno Muro, Francisco Javier; Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Pavón Mariño, Pablo; Solé Pareta, Josep; Martínez, Ricardo; Casellas Regi, Ramón; Vilalta, Ricard; Muñoz González, Raul; Mata Sáez, Javier; Ruiz Pérez, Lidia; Merayo Álvarez, Noemí; Miguel Jiménez, Ignacio de; Durán Barroso, Ramón J. (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Open Access
      This paper overviews the approach of the Elastic Networks research network to address different issues of planning and control of Flex-Grid/SDM optical networks. Firstly, we present the Net2Plan open-source planning tool ...
    • Evaluation of Add/Drop flexibility requirements in future SDM-enabled ROADMs 

      Perelló Muntan, Jordi; Gené Bernaus, Joan M.; Klinkowski, Miroslaw; Comellas Colomé, Jaume; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Conference report
      Open Access
      In this paper, we evaluate five different architectures for implementing the Add/Drop module of future Spatial Division Multiplexing (SDM)-enabled Re-configurable Optical Add & Drop Multiplexers (ROADMs) with different ...
    • Evaluation of core-continuity-constrained ROADMs for flex-grid/MCF optical networks 

      Moreno Muro, Francisco Javier; Rumipamba Zambrano, Rubén Darío; Pavón Mariño, Pablo; Perelló Muntan, Jordi; Gené Bernaus, Joan M.; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2017-11-01)
      Article
      Open Access
      To effectively keep pace with the global IP traffic growth forecasted in the years to come, flex-grid over multi-core fiber (MCF) networks can bring superior spectrum utilization flexibility, as well as bandwidth scalability ...
    • Experimental demonstration of long-distance space-division multiplexing transmission over few-mode and multi-core fibers 

      Mestre Adrover, Miquel Àngel (Universitat Politècnica de Catalunya, 2013-02-13)
      Master thesis (pre-Bologna period)
      Open Access
      [ANGLÈS] After the extremely fast growth over last two decades, single-mode fibers capacity is reaching its recently revealed fundamental limit, imposed by a combination of Shannon's information theory and fiber nonlinearities. ...
    • Fairness Analysis of Wireless Beamforming Schedulers 

      Bartolomé Calvo, Diego (Universitat Politècnica de Catalunya, 2005-01-12)
      Doctoral thesis
      Open Access
      Aquesta tesi es dedica a l'anàlisi de la justícia a la capa física en entorns de comunicacions amb múltiples antenes i diversos usuaris, cosa que implica un nou punt de vista sobre problemas tradicionals. Malgrat això, el ...